185
MAJOR CHEST TRAUMA WITHOUT CC/MCC
MS-DRG 185 groups Medicare inpatient hospital stays for: MAJOR CHEST TRAUMA WITHOUT CC/MCC. This is a medical MS-DRG. It falls under MDC 04 (Diseases and Disorders of the Respiratory System).
Payment & Classification Data
Official CMS values from the current fiscal year's IPPS Final Rule.
| Major Diagnostic Category | MDC 04 — Diseases and Disorders of the Respiratory System |
| DRG Type | Medical |
| Severity Level | None |
| Relative Weight | 0.7865 |
| Relative Weight (10% Cap Applied) | 0.7865 |
| Geometric Mean Length of Stay | 2.3 days |
| Arithmetic Mean Length of Stay | 2.7 days |
| Post-Acute Transfer DRG | No |
| Special Pay Transfer DRG | No |
Defining Codes (FY2026)
61 diagnosis codes can drive assignment here: M96.A4, M99.18, S11.021A, S11.022A, S11.023A, S11.024A, S11.025A, S11.029A, S22.31XB, S22.32XB, S22.39XB, S22.41XA and 49 more.
From the CMS MS-DRG Definitions Manual (Appendices B and E). Assignment also depends on severity, discharge status and the rest of the claim.
Contextual Map
Every relationship of 185 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.
Major Diagnostic Category
- MDC 04 — Diseases and Disorders of the Respiratory System [MDC]
Defining diagnoses (61)
- M96.A4 — Flail chest associated with chest compression and cardiopulmonary resuscitation [Grouper diagnosis]
- M99.18 — Subluxation complex (vertebral) of rib cage [Grouper diagnosis]
- S11.021A — Laceration without foreign body of trachea, initial encounter [Grouper diagnosis]
- S11.022A — Laceration with foreign body of trachea, initial encounter [Grouper diagnosis]
- S11.023A — Puncture wound without foreign body of trachea, initial encounter [Grouper diagnosis]
- S11.024A — Puncture wound with foreign body of trachea, initial encounter [Grouper diagnosis]
- S11.025A — Open bite of trachea, initial encounter [Grouper diagnosis]
- S11.029A — Unspecified open wound of trachea, initial encounter [Grouper diagnosis]
- and 53 more